Top definition
When you begin reading a page, and blank out thinking about other things. You finally come to, realizing that you read the whole page without ingesting a single word.
She was reading statistics homework when she suffered an acute case of monkey brain. I suppose thats what happens when you do your homework tipsy on the stairs in front of your building at 2:30 AM.
by the girl on the stairs. September 03, 2009
2
Adjective: Used to describe when you cannot make sense of something, or to describe a person most commonly your friend that has said some dumb shit or is dumb.
by nahor macca November 02, 2020
3
When you pull ur nut-sack out of ur pants/shorts while keeping ur dick in ur pants, thus makeing them look like a monkeys brain
by Rob Echlin July 22, 2004
4
Grab the scrotum sac and squeeze it from the base tightening the skin around the testicles. The result is a perfectly formed miniature "brain".
by Bret Austin September 10, 2004